kinds of thermocouple & how to choose index how to fix thermocouple &
fixing material
example of usage request & order Online store
(Except Asia)
Fine thermocouple Sheet thermocouple Fine and Sheet thermocouple Multi purpose thermocouple data logger anbesmt Japan

Why Fine or Sheet thermocouple are superior?

(We explain the conclusion first of all)
Conventional thermocouple Fine thermocouple Sheet thermocouple
conventional thermocouple fine thermocouple sheet thermocouple
The small contact area transfers little heat that is spread by the big ball (large heat capacity). Moreover heat is lost through big wire section area (e.g.200m). Very low response. The small contact area of the thin tip (small heat capacity) absorbs and transfers the heat quickly. Furthermore, the loss of heat is minimal with the small wire section area (e.g.25m). The large and flat contact area absorbs a big quantity of heat.
Therefore, even if there is some loss of heat by the wire section area, quick and sufficient heat transfer is possible.
Experiment method

We fixed various thermocouple on outside wall (at same height) of a stainless pan using capton tape.
Then we poured boiling water at once, and got the results below.
(Capton tape is not strong enough to hold thermocouple, particularly in case of vertical side, therefore some data is not stable.)

Data logger : KEYENCE GR-3000
Sampling time : 100ms
response rate experiment
Experimental result

Comparison of response and accuracy
comparison graph ofresponse rate

Fine and Sheet Thermocouple got quicker response and higher accuracy.



Characteristic and Usage of various thermocouple

Type of thermocouple Resistance of thermocouple itself Connectability to compensating wire Strength for small component Accuracy Response main Usage
Conventional type
(100m,
200m or
320m dia.)
best best best no good no good no good When you don't need fast response and accuracy
Fine thermocouple
(25 & 50m dia.)
best best no good best best best for small component or surface
Sheet thermocouple
(40m thick)
best best best no good best best for surface

(C)Copyright 1997 Y.Anbe All rights reserved.